You need one vial of prismatic dye per slot; this is best made now in Crescent Reach, although the components are still sold in Gunthak as an alternative, if you wish to make in the Plane of Knowledge. It’s best to skill up in Crescent Reach with the training quests to 54, then use the Fetid Essence recipe to increase brewing skill (fishing grubs plus water flask, trivial 122; components all available in Plane of Knowledge).

You need to make items with trivials of: brewing skill 68, pottery 54.